Drilling mechanism



Sept. 18, 1928.

E. G. GARTlN H E M G N I L L I R D Filed May 21, 1924- Patented Sept. 18, 1928.

UNITED STATES PATENT oFFics.

ELM ER G. GARTIN, OF CLAREMONT, NEW HAMPSHIRE, ASSIGNOR TO SULLIVAN MACHINERY COMPANY, A CORPORATION OF MASSACHUSETTS.

DRILLING MECHANISM.

Application filed May 2i,

This invention relates to drilling mechanisms.

It has for its object to provide an improved drilling mechanism. A further ob ectis to provide an improved drilling mechanism having improved hole cleansing means. Another object is to provideimproved hole cleans ng means in combinationwith a reciprocat ng hammer piston. Another bJect is to provide an improved hole cleansing means wherein two cleansing tubes are used with iinproyed tube supporting means. further ob ect is to provide a plurality of improved dependent coaxial cleansingifluid conducting tubes.

In the accompanying draw ngs I have shown for purposes of illustration one form which my invention may assume in practice.

In these drawings,

Fig. 1 is aside elevation of a drilling motor partly broken away to show details of my improved means. 7

Fig. 2 is an enlarged transverse section on line 22 of Fig. 1. i i In the illustrative embodiment of my inveiitioirI have shown the same in combination with a usual type of. drilling mechanism comprisinga cylinder 1 having arear head 2 and a front head 3, the latter-constituting a reduced portion of the cylinder-1. Reciprocably mounted within the cylinder. 1 is a usual hammer piston 4 having a striking bar 5 projecting through the head 3 to engage a usual hollow steel 6 carried by a chuck sleeve 7 rotatably mounted Within a ehuckhousing 8 carried by the front ,end of the cylinder 1. The striking bar 5 has flutes 9 on the periphery thereof adapted to engage lugs formed on a chuck nut 10 fixedly carried by the sleeve 7. Projecting forwardly from the head 2 through the striking bar 5 and into the steel 6. is a hollow cleansing fluid conducting tube 11, while concentrically disposed thereto and also projecting from the rear head 2 is a gaseous cleansing fluid conducting tube 12 terminating within a bore 13 formed within the striking bar 5.

In order to provide an extremely simple means for supporting the inner tube 11 and still allow flow of fluid through the outer tube, a reduced portion 14 is formed on the free end of the outer tube. This reduced portion engages the inner tube 11 throughout its circumference at a point in front of ports formed in the transverse or inclined portion of the tube connecting the reduced and 1924. Serial No. 714,966.

enlarged portions. It will thus be seen that fluid can flow from the large tube through the ports 15 and thence down into the steel 6, at the same time providing ample bearing surface for positioning and supporting the inner tube 11. It will be noted from Fig. 2 that the various other forms without departing from its spirit or the scope of the appended claims.

What I claim as new and desire to secure by Letters Patent is:

1. The combination with a drilling mechanism having amotor and a hollow drill steel actuated thereby, of hole cleansing means cooperating with said steel comprising inner and outer fluid conducting tubes, the outer of said tubes having a circumferentially extending reduced portion at its free eirtremity engaging the other tube throughout its circumference to support the latter tube against lateral displacement, and means permitting flow of fluid from said outer tube.

2. The combination with a drilling mechanism including a motor having a hammer piston and a hollow drill steel actuated thereby, of hole cleansing means comprising inner and outer cleansing fluid conducting tubes co opcrating with saidsteel, the free end of said outer tube being supported by said piston and having said end depressed throughout its circun'it'erence into engagement with said inner tube for supporting the free end of the latter, and means for permitting fluid dis" charge from said outer tube.

3. The combination with a drilling mechanism having a motor and a hollow drill steel actuated thereby, of hole cleansing means cooperating with said steel comprising concentric fluid conducting tubes, the forward portion of the outer tube having a reduced portion engaging the inner tube completely about its periphery for supporting the latter tube, and means including ports formed in said outer tube for allowing flow of fluid from said outer tube.

4. The combination with a drilling mechanism having a motor and a hollow drill steel actuated thereby, of hole cleansing means the inner tube for support cooperating with'li said steel coi iprisinfgconcentric fluid conducting tubes, the forward portion of the outer tube having a reduced portion engaging thinh'er tube completely about its periphery foi supporting the latter tube, and means including ports formed in said outer tube opening outwardly'thcrefrom rearwardly of said engagingportion for allowing flow of fluid from said outer tube.

5. The combination with a drilling iii-echanis n having a motor and a" hollow drill steel actuated thereby, j 7 hole cleansing means toopei'ating with said "steel comprising concentric fluid conduc'tingtflbS, the outer tube having a depr ssedportio engaging "ii Qthe latter, and

means including portsffo tube discharging at poin 'ei'igagi g p rtifo fte'pern tfiow of fluid latiei'ally'tl erefromjaiid' 'ecru lly 9f S i pr'es'sed supporting per 11. e

y .6; "The combination with a drilling mechanism i'nc'liid ing a n liavin'ga movable element anda i 'liollowklrill steel, of hole cleansing means cooperating "with said steel comprising coax iall 'ini ier and outer fluid conducting tubes, the outei' tube being supported at its free end, by said movable ele- Q i g airedujced portion engaging the inner t; e tofsup )o means including port-5f fied-in saidouter tubej i earwardly olf s 'iid'engag'in' g portion to p'ern'i'it flow jfluid later lly therefrom and elvt'cinally of said; reduced supporting porf '7.v The combination with a drilliiig mechanism having a motor and a hollow drill steel actuated "thereby", hole cleansing means cooperating witlrfsai'd steel comprising a plurality of cleansing fluid conducting tubes, one of said tubes having a reduced portion engaging the other tube to support the latter, meansfor discharging fluid from said it the latter and portion.

aetuated thereby; of hole cleansing-,iiicaus cooperating with said steel comprising concentric fluid conducting tubes, one of which supports the other, and-means .for dischar ing cleansingfluidl'aterally-from the outer of said tubes intermediate the ends thereof.

l0."The coinbination with adrilling mechanism having a motor and a hollow drill steel actuated therebyg of hole cleansing means cooperat ng w th sa d steel coinpi-isingconcentric cleansing fluid condtetin 'means, the

forward portion o f the outer one of s'aid means hinting a reduced politic engaging the inner ineans to support; the latter; and

liavi'n' ports disposed wliollyfat the rear ofsaidiediicedportion for a flow of tluid laterall'y from Ill The combination with a drilling mechanism havi nga tor and 'a l ollowdril-l steel actuated thereby; of hole. cleansing me-m COO pClfl ll i iiwltll ,Sdldi'stel comprising a cleansing [fluid conducting tube, the forward projecting portion, and portsidisjposed within said inclined poi't-ionfonallowi 'ng the flow 1. 1 H or mud laterally therefrom, said reduced portion being adapted to an accessory of said drillingmechanism. 1:5. The combinationwitha; drilli 'i'g mechin having a motor. and a hollow. drill steel actuated thereby; of "hole cleansing moans cooperating with said steel Zoinp:risiiigcoa:-i-

'ially arranged inner and outebfiuid' conducttiibes,tl1'e forward portion of the outer 1n tulge having an inclined inwmuly' oje ung portion engagingthe inner tube-to support the latter, and ports disposed'withiiifsziid' inclined portion for. allowing flow offluid laterally from said outer tube. V

The combination with a. drilling. necliv anisin having a motor and a hollow drill steel actuated thereby, of hole cleansing means coogerming with said 'steel'con'i'prising coaxially arranged inner outer l'iuid conducting tubes, the onter'tube having a reduced portion at its forward extremity engaging the inner tube to support the free end of the latter against lateral displacement, and means including ports formed ins'aid outer tube reai'wardly of said engaging portion to permit flow of fluid 'laterallygtlierefrom and longitudinally externally reduced In testimony whereof I my signature.

JELMEER G. GAR-TIN.

llui 

